Michael Bayne
a9720fd905
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3099 542714f4-19e9-0310-aa3c-eee0fc999fb1
75 lines
2.7 KiB
Java
75 lines
2.7 KiB
Java
//
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// $Id: GameWatcher.java,v 1.3 2004/08/27 02:20:14 mdb Exp $
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.parlor.game;
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import com.threerings.presents.dobj.AttributeChangeListener;
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import com.threerings.presents.dobj.AttributeChangedEvent;
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import com.threerings.crowd.data.PlaceObject;
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import com.threerings.crowd.server.PlaceManager;
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import com.threerings.crowd.server.PlaceRegistry;
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/**
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* An abstract convenience class used server-side to keep an eye on a game
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* and perform a one-time game-over activity when the game ends. Classes
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* that care to make use of the game watcher should create an instance,
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* implement {@link #gameDidEnd}, and pass the instance to the place
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* registry in the call to {@link PlaceRegistry#createPlace} when the
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* puzzle is created.
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*/
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public abstract class GameWatcher
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implements PlaceRegistry.CreationObserver, AttributeChangeListener
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{
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// documentation inherited
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public void placeCreated (PlaceObject place, PlaceManager pmgr)
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{
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_gameobj = (GameObject)place;
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_gameobj.addListener(this);
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}
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// documentation inherited
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public void attributeChanged (AttributeChangedEvent event)
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{
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if (event.getName().equals(GameObject.STATE)) {
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// if we transitioned to a non-in-play state, the game has
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// completed
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if (!_gameobj.isInPlay()) {
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try {
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gameDidEnd(_gameobj);
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} finally {
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_gameobj.removeListener(this);
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_gameobj = null;
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}
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}
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}
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}
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/**
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* Called when the game ends to give derived classes a chance to
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* engage in their game-over antics.
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*/
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protected abstract void gameDidEnd (GameObject gameobj);
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/** The game object we're observing. */
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protected GameObject _gameobj;
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}
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